Which among the following would cause the respect to noble metals bright red colour due to bursting of crackers?

Which of the following metals does not corrode?

Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?

Which one among the following metals is not stored under oil ?

Which one of the following metals does NOT react with cold water to liberate hydrogen gas?

Which of the following imparts deep blue colour to glass?